I like coming up with different ideas of an afterlife and then swap them out when I find a fancy new idea. Currently, I'm wondering if the afterlife isn't just a place where ideas, in an abstract sense, accumulate. Basically, some imaginary place where all inventions, old ones and new, wait until someone picks them up and gives them life. This can be any sort of scientific inventions but also personal lives and life stories. When someone dies, they stop being in the material sense, but the idea of their existence still lingers. First in the memories of those who remember them and later, when they are forgotten, as possible ideas for fictional stories and the likes.
In that sense the afterlife seems more like an infinite place that fades away as the eternity of existence ceases to be. It exists, because something else exists. And it stops existing, when the universe ceases to be. They're bound to each other as every life on Earth is bound to one another.